The Application of Volt-Booster Transformer as a Part of Asynchronous Motors Control Devices

This article consider a new construction of the device which helps with implementation of smooth amplitude start-up of asynchronous engines, allowing to minimize the quantity of force semiconductor keys and to meet requirements for electromagnetic compatibility. The ways of reducing mass-dimensional indexes of a booster transformer (the constructive foundation of the offered device) by the drive elimination of a network low frequency tension component in its primary winding are shown. The effectiveness of this decision is confirmed by analyzing the core magnetic status of the transformer in the starting mode, considering hysteresis and subsequent comparing patterns of direct and smooth start-up of the asynchronous engine in the computer program Matlab/Simulink.